Technical description and composition of the TELEFUNKEN TF-LED22S48T2 TV, panel type and modules used. The composition of the modules.TELEFUNKEN LED
Model: TF-LED22S48T2
Chassis / Version: CV512L-Q24
Panel: M215HVN01.1
LED backlight: CXE220160000-X2
T-CON: 21M07-C04
LED driver (backlight): integrated into MainBoard
PWM LED driver: BIT3367A
MOSFET LED driver: MMBT3904
Power Supply (PSU): integrated into MainBoard
PWM Power: LD5530
MOSFET Power: 70R900P
MainBoard: CV512L-Q24
IC MainBoard: CPU: S2T512, SPI Flash: W25Q64, AUDIO: YD1517P
Tuner: CDT-9NT372-RD60
TF-LED22S48T2 Specifications
TELEFUNKEN TF-LED22S48T2
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- TELEFUNKEN TF-LED22S48T2 TV does not turn on at all. No response to the remote control and front panel control buttons. Indicator lamps do not light up or flash.
A malfunction in such cases, first of all, should be sought in the power elements of a switching power supply (SMPS) - a mains voltage converter (AC / DC), which in this TV model is combined with the MainBoard CV512L-Q24 main board. Its output voltages should be measured, and if they are absent, check the serviceability of the power switches (70R900P) of the converters and rectifier diodes for the probability of a short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often breaks off immediately and, less often, the current sensor in the source of the key.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) LD5530, if they do not have visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately
As a rule, in such cases there is no display backlight. Usually the cause of the malfunction is in the breakage of the LEDs, or in the connectors of the LED strips, but sometimes the LED driver is also faulty.
Without a special current source, it is impossible to check the line of LEDs connected in series, and it is unsafe for them to use any voltage sources above 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Typically, Chinese multimeters with a 9V power supply lightly light up one 3-volt LED, if you connect the probes to it in the forward direction, the red probe to the anode, and the black one to the cathode. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of LED health. In the event of a malfunction of the LED, its zener diode will either be cut off or broken into the K / Z.
- The TV does not turn on, the indicator signals standby or operating mode, or blinks.
Repair or diagnostics of the CV512L-Q24 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) elements of the MainBoard - CPU: S2T512, SPI Flash: W25Q64, AUDIO: YD1517P. In cases where a BGA processor is used, its malfunction is usually detected by the local warm-up method.
Before changing the CDT-9NT372-RD60 tuner, if it is not possible to tune to television channels, you should make sure that there are supply voltages, which must be measured at the corresponding tuner terminals and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be monitored with an oscilloscope
Remember! Attempts to self-repair the TELEFUNKEN TF-LED22S48T2 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TELEFUNKEN MainBoard CV512L-Q24
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> TELEFUNKEN TF-LED22S48T2, Main: CV512L-Q24, Panel: M215HVN01.1
The appearance of the MainBoard CV512L-Q24 is shown in the figure below:CV512L-Q24
Main features of the TELEFUNKEN TF-LED22S48T2 device:
Installed matrix (LED-panel) M215HVN01.1.
Matrix control uses Timing Controller (T-CON) 21M07-C04.
To power the backlight LEDs, a converter combined with the CV512L-Q24 main board is used, controlled by the BIT3367A PWM controller. The keys of the MMBT3904 type are used as power elements of the LED driver.
The power module is combined with the MainBoard and is made according to the AC / DC flyback voltage converter circuit using LD5530 microcircuits and power switches of the 70R900P type.
MainBoard - the main board (motherboard) is a CV512L-Q24 module, using CPU chips: S2T512, SPI Flash: W25Q64, AUDIO: YD1517P and others.
The CDT-9NT372-RD60 tuner provides reception of television programs and tuning to channels.
TV TELEFUNKEN TF-LED22S48T2 with LCD M215HVN01.1, diagonal size 21.5 "(55 cm) 16: 9 format. The brightness of the screen is 200 cd / m² provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 3000 : 1. The technology of manufacturing the screen of this TV model is realized with LED backlighting.The design and technical capabilities of the TV provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD) .Supported media file formats: MP3 , WMA, MPEG4, Xvid, DivX, MKV, JPEG.
The power of the acoustic system of sound is 10 W (2x5 W), provided by two speakers. The NICAM STEREO audio processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, VGA, HDMI, USB. A headphone output is provided.
The digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: with stand 508x340x180 mm, without stand 508x305x78 mm.
TV weight: 2.2 kg.
Attention! Panel M215HVN01.1 of LED TV TELEFUNKEN TF-LED22S48T2 is an expensive and unreliable element.
Do not allow any impacts on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.
